The bid of US cable giant Comcast, for Sky, which operates in Europe using DTH and OTT video, has run the full gamut of being described as a stroke of genius (by us), widespread US analyst approval and now we are on to despair. The simple reason is that the share price of Comcast has collapsed by around 20% since the bid was launched. Comcast has not said just how it intends to pay for Sky just yet, but presumably with some element coming from those self-same shares. At least one US analyst, including some who have praised the deal, have now turned full circle and begun to ask if CEO Brian Roberts will change this mind, purely because he…